Thanks you very much for helping; 2011/8/12 Jose Luis Domingo Lopez <[email protected]>:
> Let's see if I can explain it in an easy way. First, go to Carte -> > Editer/Créer une carte. The dialog for referencing a TIFF file (and only > TIFF files, so convert them to that format before proceeding) will open on > the right part of QLGT's interface. I had reached that part, but things got complicate after that. > > First, open the .tiff file "Ouvrir un fichier". Then, configure the > "Projection de la carte" (that is, the coordinate/projection system > coordinates on the TIFF file are defined for). For example, for the usual > paper maps in Spain, it is "UTM zone 30 North, Datum European_1950). Problem is I don't know what to choose: on the Geoportail website, from which I copied the topo maps, I don't find a way to get accurate positions; that's why I rely on the Google Maps site, that gives (I think) longitude-latitude position, to get coordinates of precise points such as crossroads. Can I do this? Or both maps (Geoportail and GoogleMaps) might use different projection systems? > > I understand the "Projection de référence" is the projection/datum on the > resulting file. Use whatever fits you best. If you are going to stich > several files together, use always the same for every fragment. OK. > > In Mode you have to select how many point to provide QLGT for it to > referenciate the image. For square pixel and coordinates very precise on > the map, "pixels carré (2 points)" should be enough. Step 1 should be done. What about the overwies things? 2x, 4x and so on ... > > Next on to step 2: provide the (two in the example) points to use to > reference the image. Click "ajouter une référence", and an orange marker > will show centered on the map viewport, Though I use a 23" screen, the map appears as a narrow band as the information below take 3/4 of the screen; is there a way to increase the part allowed to the map? I can only decrease it! and an entry added to the step 2 > list. Move and zoom the map until you see at an adequate zoom level one of > the points with known coordinates, and right click on the map. Take note of > the "Pixel" coordinates, and edit the list entry to make x and y match the > pixel coordinates (double click each field to edit). I'm not sure I understand what you mean ... the movements of the point on the map seem to be auomatically reflected in the x and y coordinates. Or, are they not? There seem to be slight differences but not everywhere on the map. When I right click on the point, there is also a "Set as Pos1" that I don't know what to do about. .../... >> Additionally, I'd like to know whether I need to assemble all my >> screecopies in one huge file in order to have one map; or is it >> possible to navigate to one map to the adjacent one without having to >> group all of them in one. >> > The easiest way would be to georeference all your partial maps as shown > above, and then create a QMAP out of them, to show all at the same time, at > the same zoom levels. A QMAP is a collection of maps to show at different > zoom levels: for your case, you would have to create one with, for every > zoom level, shows every maps you want to include in the set. etc. I think this will be the next step. > Hope this helps. > > Greetings, > > -- > Jose Luis Domingo Lopez > Linux Registered User #189436 Linux Kubuntu 11.04 (Linux > 2.6.38-8-generic-pae) That was great first step, thank you very much. Marie-Noëlle -- Une galerie photos, un blog ... pourquoi pas ? Webmaster en herbe Parcourez les Cévennes à ma façon : Cévennes Plurielles Et toutes mes autres publications à partir de ma page d'accueil générale ------------------------------------------------------------------------------ FREE DOWNLOAD - uberSVN with Social Coding for Subversion. Subversion made easy with a complete admin console. Easy to use, easy to manage, easy to install, easy to extend. Get a Free download of the new open ALM Subversion platform now. http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
